Condenser with supplemental sealing member therein



Feb. 3, 1953 J. B. BI RENNAN 2,627,538

CONDENSER WITH SUPPLEMENTAL SEALING MEMBER THEREIN Filed Jan. 18, 1950 FIG. I

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FIG. 4

o lZfl H I -6J /&- 3 Ml d JNVENTOR. 14 JOSEPH B. BRENNAN MMYIGM ATTORNEYS Patented Feb. 3, 1953 CONDENSER WITH SUPPLEMENTAL SEALING MEMBER; THEREIN J oseph, B. Brennan, Cleveland, Ohio Application January'18, 1950, Serial No. 139,243

1. Claim.

This invention relates to: electric condensers, especially to seal means provided for: aiding in sealing the open end of an electric condenser tightly.

Ageneral object of the invention is to improve the construction of electric condensers, especially by the provision of better seals for the open ends of electric condensers- Another object of the invention is to provide a. seal'in an electric condenser for cooperating with other known sealing means in the condenser to aid in sealing the. condenser ends around a terminal of the condenser that. lies immediately adja-' cent the inner surface of the condenser container.

A further object of: the invention. is to provide a resilient, deflectable. sealing layer immediately adj acent: the inner surface of. a metallic condenser can adjacent. an open end thereof for cooperating with a laminated sealing member inserted into the container to form. an. improved, novel. seal for the terminalof the condenser.

The foregoing and other objects and advent ages of the invention will be made more apparent as the specification proceeds.

For a better understanding of the present invention, reference should be had to the accompanying drawings wherein:.'

Fig. 1 is a vertical section, partially broken. away, of a condenser showing the improvedseal ing means of: the invention;

Fig. 2 is a vertical section, partially shown in elevation, of a modified typeio'f condenser of the invention; 7

Fig. 3 also is a vertical section-f a. further modification of a condenser. of the invention; and

Fig. 4 is a fragmentary vertical section of yet an additional modification of the condenser of the invention.

Reference now is directed to the details of the structure shown in the drawings, and a condenser can I is shown which usually is made from a metal, such as aluminum, which has an internally protruding shoulder 2 formed on the interior thereof adjacent the open end of the condenser can. The end of the can not shown in the drawings is closed. It will be realized that the condenser of the invention may be of any conventional type although the invention is especially well suited for use in the construction of dry electrolytic condensers. A conventional condenser roll 3 is received within the condenser can I and it has the condenser roll 3 shown as provided with one or more flat terminal strips 4 and 5 protruding therefrom, whereas a further terminal strip 6 also extends from the condenser roll 3 and lies immediately adjacent the inner surface of the condenser can I. The terminal strips 4 and 5 protrude axially from the condenser roll, as indicated in the drawings. The terminal strip 6 may in some types of condensers serve as the cathode for the condenser and normally is secured to the condenser can I in such instance with the can then forming the cathode connection and portion of the entire condenser of the invention. The open end of the condenser can may be sealed by use of a laminated type of a condenser can end seal. and this laminated closure may comprise a plurality of discs with a substantially rigid, hard plastic disc I lying against a deformable, or resilient disc 8 that in turn has its other face lying against the surface of a further substantially rigid, plastic disc 0. Usually the rigid, plastic disc 9 lies adjacent or against the: shoulder 2 formed on the can which shoulder limits axially inward movement of the laminated closure means provided. By applying pressure to the outer plastic discs I and 9, the rubber disc 8 can be compressed so as to provide the desired closure action. The drawing shows that the terminal strips 4 and 5. protrude through the lam- ,inated closure means provided and suitable connector strips or terminals It are shown as being carried. by the outer plastic disc 7 and. suitably engaged with the. strips 4 and 5 to provide terminal means for the condenser of the invention.

As an important feature of the present invention, special sealing means are provided for use in association with the terminal strip 6 and these means. comprise a resilient, or deformable rubber. or. rubber like member, sleeve or band which is in immediate association with the inner surface of the condenser can I. This rubber material may even be suitably bonded to the entire inner surface of the condenser can I, or it may be separate therefrom, and the rubber sleeve may only be associated, with the end portion of the condenser can, as ndicated in the drawings illustrating the invention. Thus a sleeve I I is shown immediately adjacent the inner surface of the condenser can I and with such sleeve Il extending from the shoulder 2 to the end of the condenser can. It will be noted that the terminal strip I5 lies immediately against the radially inner surface of the sleeve II and that the radially outer ends of the sealing disc 8 bear against the inner surface of the strip It so that this terminal strip is wedged between two sealing members. Since at least a portion of the strip 6 has resilient, or deformable sealing means provided on both r surfaces thereof, such sealing means can effectively flow around the edge and facial portions of the terminal strip in order to completely seal the terminal strip in the condenser assembly and prevent any leakage of material from the condenser around the edges of the terminal strip, since it has heretofore been difficult to seal a condenser completely around the terminal strip that lies immediately adjacent the inner surface of the condenser can, if the condenser has such type of a terminal strip.

It will be realized that any suitable type of a resilient material may be used in forming the sleeve II but usually rubber, or rubberlike material should be used for this purpose since it has the desired physical and chemical properties.

Fig. 1 of the drawings clearly shows that the axially inner and outer end portions of the sleeve II are radially inwardly turned and with a cathode ring I2 being positioned adjacent the axially outer end portion of the sleeve II and a radially inwardly turned edge I3 of the condenser can I. This edge is of the condenser can is spun or otherwise worked inwardly of the condenser can in order to set up a confining pressure on the sealing discs I, 8 and 9. The inwardly turned can end also serves to retain the sleeve I I in place and to position the cathode ring I2 and form a tight unitary seal assembly at the end of the condenser can. The cathode ring I2 may have a plurality of terminals Hi extending therefrom, as indicated in the drawings.

It should be noted that the end of the terminal strip 6 which protrudes from the sleeve II is bent backwardly upon the sleeve II and may be secured in contact with the cathode ring 52, or the can, if desired. Such backwardly bent, or radially outwardly extending portion of the cathode strip 6 is indicated by the numeral 6a and is in good electrical contact with the cathode ring I2, and can.

The condenser shown in Fig. 2 is quite similar to that of Fig. 1 and includes a condenser roll 3a which is received in a can Ia. In this instance, a clamping ring 20 is secured to the open end of the can Ia and has an inwardly spun or worked end section 2! which engages with a portion of a resilient sleeve Ila and presses such portion of the sleeve, together with a laminated sealing member, or means provided for the condenser axially inwardly of the condenser to force same against a shoulder 2a provided in the can I a.

In Fig. 3, a condenser can lb is shown which has a very similar construction to the condenser can I and has a resilient sealing sleeve I Ib received therein. In this instance, a cathode ring IE1) is received within the confines of the sleeve II b. A terminal 6b extends from condenser 3b and lies against the radially inner surface of the sealing sleeve II b and has a radially inwardly turned end portion which is pressed against, or soldered or otherwise secured to the cathode ring I 2b of the condenser.

The condenser shown in Fig. 4 includes a mounting ring 50 which has a plurality of lugs 4| extending therefrom for use in mounting the condenser can assembly of the invention. In this instance, the condenser can la is shown and it is provided with an enlarged open end portion in which a resilient sealing sleeve I la is received. A portion of the mounting ring 40 is pressed or turned radially inwardly of the condenser, and also axially inwardly thereof to form a confining and sealing member in the condenser. That is, the mounting ring provides an axially extending pressure upon the sealing sleeve He and the resilient conventional laminated sealing means used in association with the sleeve I I c for sealing the condenser of the invention. The end of the can I c is not turned in on the sealing means in this embodiment of the invention.

The sealing member of the invention may be useful in conjunction with laminated discs for sealing other condensers which may have no terminal strip adjacent the inner surface of the container, which may be of any desired material.

While several complete embodiments of the invention have been disclosed herein, it will be appreciated that modification of these particular embodiments of the invention may be resorted to without departing from the scope of the invention as defined by the appended claim.

Having thus described my invention, what I claim is:

In a condenser, a can having an open end with an internal shoulder near such open end, a condenser section within said can, a terminal for said condenser section extending to said can end and being adjacent the inner surface thereof, distortable sealing means positioned radially intermediate said can and said terminal and extending around the said can adjacent the inner wall thereof, and laminated sealing members including a resilient lamina positioned in the can end and compressed axially thereof against said shoulder by an inwardly turned part of the can to force said resilient lamina to protrude radially of said can, said laminated sealing members also including at least one lamina made from dielectric material, said terminal lying between the radially outer edges of said sealing members and the radially inner surface of said sealing means.

JOSEPH B. BRENNAN.

REFERENCES CITED The following references are of record in the file of this patenti UNITED STATES PATENTS Number Name Date 1,920,799 Lilienfeld Aug. 1, 1933 1,934,515 Tyzzer 'Nov. 7, 1933 2,130,073 De Lange Sept. 13, 1938 2,144,959 Blackburn Jan. 24, 1939 2,202,166 Peck May 28, 1940 

